With all its stately homes and historic sites opulently decked out for the season, not to mention the elaborate Sinterklaas parade in Rhinebeck on December 1, Dutchess County definitely knows how to do up the onset of winter in style. And yet the evergreen laurels for “Best Event” of the holiday season were awarded by Dutchess County Tourism to an annual extravaganza in gritty downtown Poughkeepsie: the massive parade, tree-lighting and fireworks display known as the Celebration of Lights, which returns on Friday, November 30.